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annotate docs/man3/SDL_UnlockSurface.3 @ 4355:9b464226e541 SDL-1.2

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Fixed bug #855 Ludwig Nussel 2009-10-18 06:31:52 PDT an mprotect call was added to fix bug 528. However that results in a buffer that allows writing and code execution. Ie the no-execute security features of modern operating systems are defeated this way. Two mprotect calls are needed. One to make the buffer executable but not writeable when done and another one to make the buffer writeable again if the content needs to be changed.
author Sam Lantinga <slouken@libsdl.org>
date Sun, 18 Oct 2009 17:31:37 +0000
parents 1238da4a7112
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e5bc29de3f0a Updated from the SDL Documentation Project
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1 .TH "SDL_UnlockSurface" "3" "Tue 11 Sep 2001, 23:01" "SDL" "SDL API Reference"
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2 .SH "NAME"
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3 SDL_UnlockSurface \- Unlocks a previously locked surface\&.
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4 .SH "SYNOPSIS"
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5 .PP
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6 \fB#include "SDL\&.h"
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7 .sp
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8 \fBvoid \fBSDL_UnlockSurface\fP\fR(\fBSDL_Surface *surface\fR);
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9 .SH "DESCRIPTION"
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10 .PP
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11 Surfaces that were previously locked using \fBSDL_LockSurface\fP must be unlocked with \fBSDL_UnlockSurface\fP\&. Surfaces should be unlocked as soon as possible\&.
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12 .PP
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13 It should be noted that since 1\&.1\&.8, surface locks are recursive\&. See \fI\fBSDL_LockSurface\fP\fR\&.
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14 .SH "SEE ALSO"
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15 .PP
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16 \fI\fBSDL_LockSurface\fP\fR
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17 .\" created by instant / docbook-to-man, Tue 11 Sep 2001, 23:01